Improvement in machines for shaving half-round hoops



2 Sheets-Sheet 1. G. B. SELDEN. MACHINE FOR SI-IAVING HALF-ROUND HOOPS. No. 171,247.

Patented Dec. 21,1875.

N. PETER; PHOTO-LITHOGRAPHER, WASHINGTON, 0 C.

ZSheets-Shept 2. G. B. SELDEN. MACHINE FOR SHAV'ING HALF-ROUND HOOPS. No.171g247. Patgpted Dec. 21,1875.

N,FETERS. FHOTO-LITHOGRAPHER. WASHINGTON. D v

W227? eaves lvrrnn STATES PATENT QFF on.

GEORGE B. SELDEN, OF ROCHESTER, NEW YORK.

IMPROVEMENT IN MACHINES FOR SHAVING HALF-ROUND HOOPS.

Specification forming part of Letters Patent No. 1 71,247, d d D m 1, 1875; app cat filed February 20, 1874.

To all whom it may concern:

.Be it known that I, GEORGE B. SELDEN, of the city of Rochester, in the State of New York, have invented an Improvement in Machines for Shaving Half-Round Hoops, of which the.

following is a specification:

The nature of my invention consists in controlling a movable cutter-head for shaving the timber or flat side of the hoop by a system of elastic pressure-rollers on the bark side,which yield back over a knot and allow it to pass through between them and the head Without thinning the hoop opposite the knot, while, at the same time, they'cause the head to conform to the curves of the stock. 'My invention also consists in the combination, with the devices just mentioned, of a cutter-head for trimming the knots.

In the accompanying drawings, Figure 1 represents an elevation, and Fig. 2 a plan view, of a machine embodying my invention. Fig. 3 is an elevation, partly in section, of the main cutter-head and its connections. Fig.4 is a plan view of the same, and Fig. 5 a modification of the means for controlling the cutter-head.

A A is the frame of the machine, and B the driving-shaft. The hoop is fed through the machine by the feed-rollers l 2,3 4, 56, its path being indicated by dotted lines in the drawings. The feed-rollers are carried by vertical shafts stepped in the bottom plate of the machine and passing through the top plate, and are connected by a train of gears,which is driven in any convenient manner either from the shaft B or from a pulley, a, Fig. 2, on the shaft of the shaving cutter-head. Of the feed-roll: ers, l and 5 revolve in stationary boXes,while rolls 3 and 4, although clamped together by a spring, are free to travel, with the curves of the stock, across the line of feed. 0, Figs. 1 and 2, is the knotcutter, which consists of a movable cutter-head, D, Fig. 2, held against the bark side of the stock by a spring and controlled in its operation on the knots by a yokeframe which swivels about the head and has rests a b, Fig. 2, which bear on the stock be fore and after the head. The frame E, Fig. 1, Whiehsupports the shaft of the cutter-head D, is swung on trunnions at e 0, and the cutterhead is driven from the main driving-shaft B its boxes. This head is driven from the shaft B by the belt H, Fig. 1. A movable frame,

consisting of rods cf, Fig. 3, sliding in suitable standards g h, and of end pieces I J, is boxed on the outer end of the shaft dat K, and partakes of the motions of thehead. A frame, L, Fig. 3, fitted to the rods 6 f, carries the knotpasser M. This consists of a U-shaped casting, shown in section in Fig. 3, pivoted in the jaws of the frame L at z i,

and affording support for the sliding pieces l l, which carry the yielding pressure-rollers k k k, Fig. 4. The two wings of the U-shaped casting or knot-passer frame are'bored with a series of holes to receive the sliding pieces H and the spiral springswhich surround them, and each roller K is supported by its corresponding slides, at top and bottom, on a pin which passes from one slide -to the other. A plate, m, Fig. 3, on the back end of the knotpasser frame, prevents the slides l I from being pushed out of their holes by the springs 0 0, and a suitable flange-guide, j, Fig. 4, attached to the outer end of the first pair of slides, facilitates the entrance of the hoop between the knot-passer and the head G. Each of the rollers 70 k it yields back on its own springs independently of the others. The pivotal points i i of the knot-passer frame should be as near the knives as possible, and the swinging motion of the knot-passer on its pivots t' 73 must be limited by suitable stops, so as to prevent the rollers It 70 70 from coming in contact with the knives. The equalizing-springs n a, Fig. 2, serve to hold the knotpasser in proper 'position when doing no work. The sustainingframe I and the knot-passer may be moved to and from the head, to gage the thickness of the hoop, by means of the screw-rod 10, Figs. 3 and 4. A rest, q, Figs. 3 and 4, attached to the frame L, or to the lower rod f and the frame L, passes under the knot-passer, and by itsinner end, which is shaped to conform to the knife, supports the hoop during the shaving process. Inside of the cutter-head G is placed a narrow ring, r,'Figs. 3 and 4, flush with and as near as possible to the finishing-point of the knives. The cutter-head G and the movable frame, with its connections, are all drawn backward by the springs t t on the rods 0 f. A stationary vertical rest, s, Fig. 4, secured to the frame of the machine in front of and close to the head G. supports the hoop against the pull of the springs t t. The head, when not at work, isslightly back of the rest 8, and, as the hoop enters between the head and the knot-passer, the head is drawn forward to get at its work. The springs 00 in the knot-passer are collectively stronger than the springs t t, which draw the head away from the stock, and a curve in the hoop, acting against all the rollers of the knot-passer, will draw the head forward and cause it to conform to the curve, while a knot acting against a portion only of the rollers at once'will pass through by forcing the rollers k k it back one after another, (see Fig. 4,) without-pulling the head into the stock, any sudden tendency in the head to gouge into the wood being. resisted by the internal ring 4, which has a continuous bearing on the shaved surface of the hoop; and at the same time that this operation is going on the head may be coming forward or falling back in conformity to the general outline of the stock.

' I have used the knot-passer with only four rollers init, but prefer six, and generally make them five-eighths or three-fourths of an inch in diameter, and place'them as close together as possible.

For shaving angular splints-that is, splints obtained by splitting poles into three or more partsI use a grooved feed-roll in place of rolls -1 and3.v These rolls are feathered on their shafts, to enablethem to rise and fall with the vertical curves of the stock, and their use is to so present the stock to the cutter-head G that it may be shaved on the proper line.

On heavy stock the knot-passer may consist of a single yielding roll, B, Fig. 5, arranged to yield back, in passing the knots, on a spring on the rod 1).

I claiml. The movable cutter-head G, controlled by the yielding knot-passer M on the bark side of the hoop and the supporting'rest q, traveling with the head G, in combination with the stationary rest 8, substantially as described.

2. The movable cutter-head G, when provided with the ring 1, in combination with the yielding knot-passer M on the bark side, operating substantially as described.

3. The knot-cutter O, in combination with the movable cutter-head G, provided with the internal ring 1' and the knot-passer M on the bark side, operating substantiallyas and for the purposes set forth.

4. The movable cutter-head G, provided with the internal ring 1" and knot-passer M on the bark side, in combination with the angular feed-roll 2 or 3, either or both, operating substantially as described, for the purposes set .forth.

5. In combination with the movable cutterhead G, controlled by the yielding knot-passer M on the bark side, the supporting-rest q tra\ eling with the head.

6. The combination of the movable cutterhead G, controlled from the bark side by the the knot-passer M with the rest 8.

7. In combination with the movable cutterhead G, provided with the ring 1', the pivoted knot-passer frame M, containing a series of rollers, 70 k 70, operating to control the head and pass the knots, substantially as described.

8. The movable cutter-head G, when pro-- vided with the internal ring 1', in combination with the yielding roll R on the .bark side of the hoop, operating substantially as described.

' GEORGE B. SELDEN.

Witnesses:

F. A. MA00MBER, M. H. BRIGGS. 

